KR20040025663A - Closing unit for the nozzle strip on a nozzle beam for hydrodynamically needling fibres of a web of fabric - Google Patents

Abstract

In the structure of the nozzle beam according to DE-A-195 01 738 the insertion slit for the nozzle strip 14 seals the tip side of the nozzle beam through screws 16 and 17 which are fixed by screws. A special closing unit 26 with an opening 3 for the nozzle strip is provided on the tip side and the nozzle strip 14 is closed when the opening 30 is waterproof and closed by a fixed insertion mandrel 31. It can be replaced easily.

Description

CLOSING UNIT FOR THE NOZZLE STRIP ON A NOZZLE BEAM FOR HYDRODYNAMICALLY NEEDLING FIBRES OF A WEB OF FABRIC}

The device of this type is disclosed in German patent 195 01 738, the content of which is described in the drawings, supplemented with the prior art. In the pressure chamber, a hydraulic pressure of 1,000 bar or more is generated and, of course, acts on the end wall of the injection manifold. In order to create an orifice in the manifold, one tip side must first be opened and then closed by a cover. A special cover is provided not only in the pressure distribution chamber but also in the pressure chamber, which is attached to the injection manifold wall by screws. The special cover also allows for close contact with the spray strip replacement opening, which is attached to the spray manifold by screws. O-rings recessed in the millwall are provided to seal the fluid.

If a replacement of the spray strip is required, the two screws attaching the cover to the manifold are loosened with a screwdriver, after which the water supply is shut off and the cover and screws are fixed to the side for reuse. Although the two can only be loosened with screws, a screwdriver is still required for this operation, which can be viewed as a disadvantage.

The present invention relates to a manifold consisting of an upper compartment and a lower compartment extending to operate over a web length.

a. The pressure chamber of circular cross section is located over the length of the upper section and the fluid is supplied under pressure, for example at the tip side of the chamber;

b. A pressure distribution chamber is provided in the lower compartment in parallel with the above;

c. The pressure dispensing chamber discharges a cross section of the pressure dispensing chamber into a thin fluid discharge slot on the opposite side;

d. The spray strips are laminated in a waterproof manner in the injection manifold on top of the fluid discharge slit;

e. The spray strips can be replaced via a pluggable opening on the distal end of the spray manifold, which is quite sophisticated for the hydrodynamic spray action of a fibrous web moving along a manifold, such as a fibrous web, tissue or the like or a fabric or knit. An injection manifold of a device for generating a fluid injection.

An example of an injection manifold of the type according to the invention is shown in the following figure.

1 is a cross-sectional view of a conventional injection manifold.

2 is a front view of the injection manifold of FIG.

3 is a cross-sectional view taken along the line C-C of FIG. 1 showing the lower unit of the injection manifold.

FIG. 4 is a cross sectional view of the IV-IV line of FIG. 5, in particular one of the front views of the two injection manifolds of FIG. 1 supplemented by a novel quick change device for spray strips. FIG.

5 is a plan view of the device of the front portion of the injection manifold;

FIG. 6 is a partial view of a hermetic unit similar to FIG. 4 with another bearing barrel for the spray strip; FIG.

FIG. 7 is a partial view of FIG. 6 with the insertion mandrel removed; FIG.

8 is a plan view of FIG.

FIG. 9 is a schematic view illustrating a process of rapidly attaching a spray strip in the quick change apparatus of FIG. 6. FIG.

It is an object of the present invention to find a solution of an injection manifold of the type mentioned earlier which allows for quick replacement of the injection strip without the need for a disassembly device and a screwdriver.

The purpose is

f) providing a closing unit on an opening that can be closed and

g) the opening is provided with an insertion slot for the spray strip at the level of the stacking position of the spray strip,

h) The slot consists of being able to be closed by an insertion mandrel.

The insertion mandrel can be held by a bolt fixed in the closing unit, and the bolt can be easily removed from the hole holding the insertion mandrel in the injection manifold after the water supply is shut off. Loss of the bolt can be prevented by, for example, securing it to the injection manifold using a connection such as an apostle; The insert mandrel can be manually removed from the closing unit, preferably along the spray strip, and the same item is inserted along the insert mandrel after being replaced with a new strip.

The injection manifolds shown in FIGS. 1 to 3 are those disclosed in German patent 195 01 738 but can be replaced by other configurations on a similar principle. The housing of the injection manifold consists of an upper compartment 1 which is attached to a plurality of lower compartments 2 from its lower side in its longitudinal direction by screws (not shown). Upper compartment 1 has two longitudinal cavities 4 and 5, the upper one being pressure chamber 4 and the lower one being pressure distribution chamber 5. The two chambers are open at their tip sides but closed by screws 6 and 7 with screws to form a watertight seal. At the other end, chamber 4 has an opening 4 'through which the fluid is introduced under pressure. The two chambers 4 and 5 are separated by partition 8. The plurality of passages 9 provided in the partition 8 in the length of the injection manifold connect the two chambers so that the fluid introduced into the pressure chamber 4 is introduced into the pressure distribution chamber 5 in the only way distributed in the longitudinal direction. The pressure distribution chamber is opened at the bottom by slot 10, the slot being relatively small compared to the diameter of the cavity of pressure distribution chamber 5 and extending the length of the manifold.

Upper compartment 1 is permanently screwed into lower compartment 2 to form a watertight seal. The seal is formed by an O-ring 11 which is inserted into the annular groove of the upper compartment 1, and the slot 10 surrounds the spring projection 23 which fixes the titration groove 25 of the lower compartment 2. Another annular groove 12 'is formed at the bottom of the groove 25 of the lower compartment 2 and the O-ring 12 of the groove 12' is inserted to seal the spray strip 14. On top and bottom of the fluid passages 9 and slot 10, another slot 13 is formed in the lower compartment 2, which is provided with an opening which is quite close at the top and slightly wider than the width of the effective injection orifice of the injection strip 14.

Located in line with the cover 6, 7 or rear housing end wall 15, the lower compartment 2 is screwed to provide a watertight seal by the additional covers 16, 17. Each of the grooves 18, 19 is integrated with the covers 16, 17 at the level of the lower spray strip 14 retained in the lower compartment and forms a groove in the spray strip 14 to facilitate removal or replacement after disassembly of the cover 16 or 17.

In the positions of the covers 16 and 17 with the screws of FIGS. 1 and 2, during the replacement the screws are left uncoupled and placed together with the covers 16 and 17, and the protrusion sealing unit 26 provided according to FIGS. Opposite the leading end of upper compartment 1 of the manifold, the unit allows for rapid replacement of the spray strip 14. The unit consists of a block that matches the width of the injection manifold, one side of which is permanently fixed on the lower compartment 2 of the injection manifold by screws 26, 27, which blocks the continuous slit 29 for insertion of the injection strip 14. It is included in the side center part. On the other side of the same height there is an insertion slot which is open to the outside and into which the injection strip 14 can be inserted and can be closed by the insertion mandrel 31. For the stability of the insertion mandrel in the insertion slot extending adjacent to the insertion opening 30, the closing unit 26 of FIG. 4 is continuous from the top to the bottom coincident with the adjacent hole 33 in the insertion mandrel 31 in the state inserted in the insertion opening 30. It is provided with a hole 32. The insertion mandrel 31 is stable to the closing unit 26 by holes 32 and 33 through the compartments 26 and 31 and bolts 34 inserted therein, which in turn stabilize the injection manifold. The bolt 34 is easily adjusted in the holes 32, 33 by the closing unit 26 protruding opposite to the tip side of the injection manifold.

The insert mandrel 31 is O in the insertion opening 30 while the block 26 along its distal end 26 'extending in the injection manifolds 1, 2 is sealed by the ring gasket 36 at the distal end of the distal end 26' in the upper compartment 1 and the lower compartment 2. -Closed by ring 35.

In FIG. 4, the spray strip 14 is fixed in the slot 37 at the distal end of the insertion mandrel 31, for example by a pin 38 or a friction spring and can be easily moved back and forth by the grip 39 at the other end of the insertion mandrel 31. To replace the spray strip, simply remove the hydraulic pressure and the return bolt 34 in the spray manifold. The spray strip 14 is easily removed by the grip 39 and a new strip is inserted after the spray strip 14 has been replaced. Only once is the insertion bolt 34 through the holes 32, 33 to secure the insertion mandrel 31. The hydraulic pressure can then be increased.

In the device of Figs. 6-9, which are of the same principle, the rapid replacement of the device for the spray strip 14 has been modified. The device consists of two spring strips 40, 41, which are pressed against each one in contact with the top of the other and parallel to the spray strip 14 at the tip side of the insertion mandrel 31. The spring strips 40, 41 are bent relative to their free ends as shown in FIG. 9A. The short pins or hemispheres 42 are bent upwards in the lower spring strip 40 to contact in this area and the pins or hemispheres penetrate the matching holes 43 in the upper spring strip 41 when the spring strips 40 and 41 contact each other. One end of the spray strip 14 has a corresponding hole 44 through which the sphere 42 of the spring strip 40 passes to hold the strip 14 on the insertion mandrel 31. This arrangement, as in Fig. 9E, allows the spray strip 14 to be quickly replaced. The two spring strips 40, 41 are only going to bend up at the ends of the spray strip 14 and the replacement procedure for this arrangement is made according to Figs. 9g and h.

6-8, bolt 34 'extends horizontally rather than vertically. Bolt 34 'thus covers the insertion hole for screws 27 and 28; However, they are deeply buried in conical life preservers and rarely need to be replaced. In addition, the free end of the bolt 34 'protrudes from the closing unit 26 and passes through the ring 45 which functions as a contact sensor for the complete locking of the closing unit 26. In this respect, the ring 45 which laterally contacts the closure unit 26 is electrically connected to the control unit of the injection manifold with wire 46 so that the water pressure increases only if the closure unit 26 is completely blocked by the bolt 34 '.

Claims (19)

Manifold consisting of upper and lower compartments extending to operate over the length of the web a) the pressure chamber of circular cross section is located over the length of the upper compartment and the fluid is supplied under pressure, for example at the tip side of the chamber; b) a pressure distribution chamber is provided in the lower compartment in parallel with the above; c) said pressure dispensing chamber discharges a cross section of the pressure dispensing chamber into a thin fluid discharge slot on the opposite side; d) the spray strips are laminated in a watertight manner in the injection manifold on top of the fluid discharge slit; e) the spray strip is replaceable through an openable closure on the tip side of the spray manifold, f) a closing unit 26 is provided on the opening which can be closed, g) the opening is provided with an insertion slot 29 for the spray strip 14 at the level of the stacking position of the spray strip, h) the slot can be closed by an insertion mandrel 31 A spray manifold of a device for generating a highly sophisticated fluid spray used for hydrodynamic spraying action of a fibrous web, such as a fibrous web, tissue, or the like, or a fiber web moving along a manifold such as a fabric or knit. The method of claim 1, Injection closure manifold, characterized in that the closing unit (26) projects opposite to the tip side of the injection manifold (1, 2). The method according to claim 1 or 2, The insertion mandrel (31) is characterized in that it is held in the injection manifold (1, 2) by bolts (34. 34 ') fixed in the closing unit (26). The method of claim 3, A bolt (34 ') inserted into the closing unit (26) is in contact with an operating switch (45, 46) capable of starting the injection manifold after contact is made. The method of claim 4, wherein The operation switch (45, 46) is characterized in that it is attached to the closing unit (26) on the outlet side of the bolt (34 '). The method according to claim 4 or 5, The actuation switch (45, 46) is characterized in that the injection manifold consists of an electrically active ring (45) which can trigger an "on" contact when the bolt (34 ') is inserted. The method according to any one of claims 1 to 6, Injection manifold, characterized in that the insertion slot (29) in the closing unit (26) is relatively large relative to the diameter of the injection strip (14) and the insertion mandrel (31) is filled in the insertion opening (30). The method according to any one of claims 1 to 7, The closing unit 26 has a passage 32 arranged perpendicular to the insertion opening axis and is movable through the bolts 34, 34 ′, the insertion mandrel 31 having a diameter of the bolts 34, 34 ′. Injection manifold, characterized in that it has a matching control hole (33). The method according to any one of claims 1 to 8, Injection manifold, characterized in that a retainer for the injection strip (14) is provided on the tip side of the insertion mandrel (31). The method of claim 9, The spray strip (14) is characterized in that it is attached to the bearing barrel so as to be interchangeably replaceable. The method of claim 9 or 10, The insertion mandrel (31) is characterized in that it has a blind slot (37) on its tip side that is coincident with the injection strip (14). The method of claim 11, Injection manifold, characterized in that the spray strip (14) is maintained to be easily replaceable within the blind slot (37). The method of claim 9 or 10, The bearing barrel is squeezed together and attached to the insert mandrel 31, which consists of two spring strips 40, 41 which protrude without limitation from the mandrel and hold the spray strip between the spring strips. . The method of claim 13, A spherical protrusion (42) is attached to one of the spring strips (40) and the protrusion extends into the hole (43) of the other spring strip (41). The method according to any one of claims 1 to 14, Injection manifold, characterized in that the injection strip (14) has a hole (44) at one end which is connected to the bearing barrel of the closing unit (26). The method according to any one of claims 1 to 15, Injection manifold, characterized in that an O-ring is provided around the insertion mandrel (31). The method according to any one of claims 1 to 16, An injection manifold, characterized in that a grip (39) is provided at the distal end of the insert mandrel (31) opposite the bearing barrel of the injection strip. The method according to any one of claims 1 to 17, The closing unit 26, which projects preferably opposite the protruding side of the injection manifolds 1, 2, constitutes a block, and the rear end on both sides of the insertion opening is provided on the proximal side of the injection manifolds 1, 2. And a central portion of the insertion slot (29) is provided for the spray strip (14), the strip being held therein. The method of claim 18, Injection manifold, characterized in that the free end (26 ') of the closing unit (26) extending in the injection manifold (1, 2) along the corresponding groove in the injection manifold is sealed against the injection manifold (1, 2).